Six fire engines and around 40 firefighters responded to a fire near Quebec Road, Ilford.
A caravan was destroyed by the fire. Two nearby outbuildings were also damaged by the fire, and a range of fence panels were destroyed. A 30kg cylinder was cooled at the scene after it became exposed to the fire. There are no reports of any injuries.
The Brigade was first called about the incident at 0108, and crews from Ilford, Hainault, Stratford and surrounding fire stations attended the scene. Firefighters were able to bring the incident under control by 0249.
The cause of the fire is under investigation by the Brigade and Metropolitan Police Service.